Can you make a field appear by choosing a particular category?

This is a bit of a general question, but I was wondering if Kace could do something like this. Is it possible to make a field appear on the screen based on what the user selects?

In our current ticketing system, when a user selects printers from the device category, another field pops up requiring the user to put in the model of that printer. It only happens if they choose printers. Same thing with the web site access. If the user selects our internet access field, a box will pop up asking them to type in the URL or the site they are trying to access. This field will only come up if they select internet access. Other categories are the same.